Hmmmmmm

Killzone 3 was trying to take more of a page from Call of Duty and I didn't end up caring for that.

Sunk many hours into Killzone 2's multiplayer so I'm leaning towards it.

As far as singleplayer.... eh, rather weak story for both.

I noticed that also. They made the controls much more fluid and fast just so the cod players wouldn't complain that it felt clunky and slow. The multiplayer was still good though. It's such a beautiful game.

They were still quite bit heavier than COD, even if they were tightened up.

Killzone 2 felt more frantic, like the perceived feeling of being in the middle of a war on foreign soil. Killzone 3 felt more like a game, varied enemies, levels, and fighting styles. It's really hard to say which is better due to that. It really depends on the mood I am in.

One thing is concrete, FPS's should only be played with motion control, so on that front, K3 has a decisive victory.

I dont play much MP, so from a campaign perspective, I thought that KZ3 was much better than KZ2. As already mentioned the graphics and variety of settings is much better, the vehicles and weapons are superior in KZ3 and most importantly of all, there was no infinite spawning helghast in KZ3 which is one of the most annoying things in KZ2. While the story is better in KZ3, I thought KZ2 story was a bit darker and more thought-provoking especially with Rico's action at the end (avoiding spoiler here).

kz3 all the way. kz2 was amazing and all, but kz3 beats it in every aspect except selections screens lol

Killzone 2 has the best console multiplayer. KZ3 had a better single player (though worse ending).

For KZ4 I want

KZ1 campaign (multiple characters)
KZ2 multiplayer
KZ3 vehicles and operations mode